Improvement in earth-augers



C. W. TWIGG.

EARTH-AUGER. N 178.201 Patented May 30,1876.

UNITED STATES PATENT OFFICE.

CHARLES W. TWIGG, OF NORTH UNION, INDIANA.

IMPROVEMENT IN EARTH-AUGERS.

Specifieationfonning part of Letters Patent No. 178,207, dated May 30,1876; application filed April 19, 1876.

To all whom it may concern.-

Be it known that I, CHARLES TWIGG, of North Union, in the county ofMontgomery and State of Indiana, have invented certain new and usefulImprovements in Post-Hole Angers; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to whichitappertains to make and usethe same, reference being had to the ment are hereinafter set forth, andshown in' the accompanying drawings, in which Figure l-represents aperspective of a posthole auger embracing my invention; Fig.2, a topview, the shaft, being cut on. above the bits; Fig. 3, a similar view,showing the bits adjusted to cutaholeof greater diameter; Fig. 4, abottom view, and Fig. 5 a vertical section through the bits and theircross-piece or carr1er.-

Referring to these drawings, A represents the shaft of a post holeauger, and B B the disks, which have downwardly-extending and lippedcutting-bits a a, as usual.

The shaft A pierces and carries a crosspiece, 0, extending equidistantupon each side of said shaft over the disks B, and holding them in theirfunction'and to their adjustment in the following manner: Each end ofthe cross-piece O has a longitudinal slot, b b, and each disk orsemi-disk B has a slot, 0, equal in length or nearly so to said slots1), and when the parts are attached the slots of the crosspiece are atright angles to the slots of the disks. The fastening of the disks andcrosspiece is by square bolts dd, held by clamp,

nuts 0 and washers f, to hold the disks firmly in the desired positionwith reference to the cross-piece. This position is determined by thediameter of the post-hole.

In Fig. l' the bits are shown as cutting in But in order outside of theordinary circumferential line of cutting, and hence, as each bit cuts inan opposite direction, the circumferential cuttingline is increasedwithout increasing the surface of the disks themselves.

From this description it will be readily seen that a post-hole augercapable of cutting onesized holes hitherto, may be rendered capable ofcutting difi'erent sized holes by adapting my arrangement andconstruction of crosspiece and slots thereto.

I claim 1. In a post-hole auger, a slot or slots in the connecting crosspiece at right angles with and in combination with slotsin the disks orcutters, as and for the purpose described.

2 The combination, in a post-hole auger, of

t the cross-piece 0, having slots I) b, the cutters B, having slots 0 atright angles thereto, and the square bolts d d, said bolts clamping thecutter and cross-piece in position, as described,

to effect the purpose set forth.

In testimony that I claim the foregoing I have affixed my signature inpresence of two witnesses.

CHARLES WESLEY TWIGG.

Witnesses:

JAMES F. TWIG-G, JAS. KELSEY.

